Re: [PATCH v2 0/2] MIPS: convert to generic entry

On Tue, Sep 14, 2021 at 05:30:14PM +0800, Feiyang Chen wrote:

On Tue, 14 Sept 2021 at 16:54, Jiaxun Yang [off-list ref] wrote:

quoted

在 2021/9/14 2:50, Feiyang Chen 写道:

quoted

Convert MIPS to use the generic entry infrastructure from
kernel/entry/*.

v2: Use regs->regs[27] to mark whether to restore all registers in
handle_sys and enable IRQ stack.

Hi Feiyang,

Thanks for your patch, could you please expand how could this improve
the performance?

Hi, Jiaxun,

We always restore all registers in handle_sys in the v1 of the
patchset. Since regs->regs[27] is marked where we need to restore all
registers, now we simply use it as the return value of do_syscall to
determine whether we can only restore partial registers in handle_sys.

can people, who provided performance numbers for v1 do the same for v2 ?

Thomas,

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